fiddlecollector

Caribbean pernambuco is probably the same as Mexican pernambuco or Chakte Viga,same family as true pernambuco but has slightly different properties and from what ive heard doesnt make great bows.

i found it was not very suitable ,too weak and floppy at normal bow dimensions but these wood vary tree to tree so someone else may have better look.

People are getting increasingly sensitive to comments these days I know these Enrico Rocca instruments sell for alot these days but personally i wouldnt pay anywhere like these prices for any modern Italian violins even if i had the money to squander , the world has gone silly! The instruments may be a good investment but only as long as there is a market out there full of people who havent wisened up yet. I dont care who agrees or disagrees with me on the subject. But just a personal opinion.

Its pernambuco .

I wouldn`t call what your describing as a lift. Lifts are usually small end grain run out areas. Sounds alot like a natural split along the grain that pernambuco is especially prone to and often very hard to detect even during making but usually show up when heating the stick to camber . They can then often disappear when the wood has cooled down. So it might have always been there.. Hard to say much else without photos.

looks like the underslide of the frog is sticking out further than the sides of the stick so id say no about the frog .(it can stick out if the frog is damaged but yours doesnt look damaged)

The top facet of the handle has been planed ,to usually widen the facet or other reason. You can tell easily by the look of it and the end view of how clean the edge of that facet is. It appears to be too wide for that frog.

I dont know what Martin is on about looks pretty more of less rounded to me. The screw fits with 19th century as well

Its a nice bow and i would say around 1880.

https://shop.espen.de/en/Tonewood-String-Instruments/bow-blanks/Violin-Camel-Thorn-Acacia-Lucchi--6000---6300.html If your talking Baroque type bows then they used lots of lower density ,less stiff woods.Camel thorn is a Southern African wood.

Acacia is a huge group and the specific type used by some bowmakers is usually camel thorn or giraffe thorn ,it has various names . https://en.wikipedia.org/wiki/Vachellia_erioloba it is an extremely stiff wood often too stiff.

Sorry but Black walnut is far too low in density to make a modern bow and doesnt have the strength. You would be better off finding some straight grained ipe or other dense tropical timber as used for flooring /decking or similar,as long as the grains straight.

Also if the inner ebony core of the button is octagonal as opposed to the more common round type then there is really no reason for pinning as the ring doesnt slip and twist round out of position (which a pin stops on round ebony cores).

Sorry no or if i have, i cant seem to find other photos at the moment.

Heres the back of a supposed 1917 viola. Also i assume your violin was bought as"labelled Azzola and not by Azzola"? No offence intended here just doubt anyone would have said by Azzola in the 1990`s.